If this interaction between Ben Affleck and Christian Bale is true then wow.

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"Before we started the movie I was getting my kid a Hallowe'en costume. My son is really into Batman," Affleck explained.
"We went to a costume store in Los Angeles... it was pretty empty. And I was in the aisle and I heard this 'Oi!', and I turned around, and it's Christian Bale!
"And there he and I were, standing in the Batman section."
"I said, 'Do you have any tips?'," Affleck recalled. "'And he said: 'Make sure you can piss in that suit.'"
Bale was also in the costume shop to buy his son a Batman suit, Affleck added: "He doesn't just hang out [in the Batman aisle]".